package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderDetailMapper;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.*;
import java.util.stream.Collectors;

@Service
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;

    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while(!begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        List<Double> turnoverList=new ArrayList<>();
        dateList.forEach(
                //查询date日期对应的营业额数据，营业额是指：状态”已完成“的订单金额合计
                date -> {
                    LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
                    LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
                    Map map=new HashMap();
                    map.put("begin",beginTime);
                    map.put("end",endTime);
                    map.put("status", Orders.COMPLETED);
                    Double turnover=orderMapper.sumByMap(map);
                    if(turnover==null)turnover=0.0;
                    turnoverList.add(turnover);
                }
        );

        return TurnoverReportVO
                .builder()
                .dateList(StringUtils.join(dateList,","))
                .turnoverList(StringUtils.join(turnoverList,","))
                .build();
    }

    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while(!begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        List<Integer> newUserList=new ArrayList<>();
        List<Integer> totalUserList=new ArrayList<>();
        dateList.forEach(
                date->{
                    Map map=new HashMap();
                    map.put("end",LocalDateTime.of(date,LocalTime.MAX));
                    Integer totalUser = userMapper.countByMap(map);
                    map.put("begin",LocalDateTime.of(date,LocalTime.MIN));
                    Integer newUser=userMapper.countByMap(map);
                    totalUserList.add(totalUser);
                    newUserList.add(newUser);
                }
        );
        return UserReportVO
                .builder()
                .dateList(StringUtils.join(dateList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .build();
    }

    @Override
    public OrderReportVO getOrdersStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while(!begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        List<Integer> orderCountList=new ArrayList<>();
        List<Integer> validOrderCountList=new ArrayList<>();
        for (LocalDate date : dateList) {
            Map map=new HashMap();
            map.put("begin",LocalDateTime.of(date,LocalTime.MIN));
            map.put("end",LocalDateTime.of(date,LocalTime.MAX));
            Integer orderCount=orderMapper.countByMap(map);
            orderCountList.add(orderCount);
            map.put("status",Orders.COMPLETED);
            Integer validOrderCount=orderMapper.countByMap(map);
            validOrderCountList.add(validOrderCount);
        }
        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();
        Integer validtotalOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();
        Double orderCompletionRate=0.0;
        if (totalOrderCount!=0) {
            orderCompletionRate=validtotalOrderCount.doubleValue()/totalOrderCount;
        }
        return OrderReportVO
                .builder()
                .dateList(StringUtils.join(dateList,","))
                .orderCountList(StringUtils.join(orderCountList,","))
                .validOrderCountList(StringUtils.join(validOrderCountList,","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validtotalOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }

    @Override
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime=LocalDateTime.of(begin,LocalTime.MIN);
        LocalDateTime endTime=LocalDateTime.of(end,LocalTime.MAX);
        List<GoodsSalesDTO> salesTop10=orderMapper.getSalesTop10(beginTime,endTime);
        List<String> names = salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String nameList=StringUtils.join(names,",");
        List<Integer> numbers = salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numberList=StringUtils.join(numbers,",");
        return SalesTop10ReportVO
                .builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
    }

    @Override
    public void exportBusinessData(HttpServletResponse response) {
        LocalDate begin = LocalDate.now().minusDays(30);
        LocalDate end = LocalDate.now().minusDays(1);
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(
                LocalDateTime.of(begin, LocalTime.MIN), LocalDateTime.of(end, LocalTime.MAX));
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        try {
            //基于模板创建excel对象
            XSSFWorkbook excel=new XSSFWorkbook(in);
            //获取文件的Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");
            sheet.getRow(1).getCell(1).setCellValue("时间："+begin+"至"+end);
            sheet.getRow(3).getCell(2).setCellValue(businessDataVO.getTurnover());
            sheet.getRow(3).getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            sheet.getRow(3).getCell(6).setCellValue(businessDataVO.getNewUsers());
            sheet.getRow(4).getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            sheet.getRow(4).getCell(4).setCellValue(businessDataVO.getUnitPrice());


            for (int i = 0; i < 30; i++) {
                LocalDate date=begin.plusDays(i);
                BusinessDataVO businessData = workspaceService.getBusinessData(
                        LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                XSSFRow row = sheet.getRow(i + 7);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }
            ServletOutputStream outputStream = response.getOutputStream();
            excel.write(outputStream);

            outputStream.close();
            excel.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}
